Book2 Unit 3 computers教学案(14)

提，问出题Tas 1k. Anwes trh queetsoisnb yre adni thgep asags.e1 ).Is Ady an ral eperon?sNo, itis n’t .t Isi aroot.b 2. )hWa tpratd esoA dynp ly an iheta dnoir doftoallbte ma A?stri

ker 3). hWichc opmeititnoha Asdnybe e not T?heco petitmoin inNago ay, apan Jna id Snettlae ,Wshiagnotn. ).4D d inAd’sy tea mwin te Seathtel ompceittion?No, teh ryaned thkesecond p alec. )5. Woh hlepsA dyn mvo ie tnhefo tboll caopemtiion? Thte progarmerms

.合探究, 作解问题 决Tsk2.aRedang i. 1FsatR edian gaTks.Ask 2stdunet sotread the apssae fgsa atn dthe gne thetm iani ead an dten hwrtiedo n whtem aniid ea Miani da: eht eroobtcan m vo anedc mpeteow th i pargoarm iwhta enecltrnoc irabin. 2. Fil li nte fhilefo rAn yd. Nmae:A nd yppearancA:e looks ile akhuman S iz: esa bg ia as umha nhCaacretr:co pmtietive,co-ope rtaievA bliiy: tacn ovm aedn hitnkl ike aJ b:o stirkr ehman u识知理, 随堂检梳测 Tsa 3kL.aren tehfol lowngila gunag peiontsin he senttncee. 1.ssgnil an 信号,. 势,手 音声,暗号 . 发信v; 用号信传达号;信号用 通与讯Eg :Mi corwaveov ens cana losdis rut ypuo wrrilesse igsal.n微 波可能炉也会干扰的无你信号线 联想拓 send展/ivg a siegnla 发号 rec信iee/pvikcu pa sinagl 收接号信 isgalnt sb/oth for sths用信号 传达(信某息 s)igna wilht用 发信号 igsnl a(t)o b.so dt otsh示意某人.做某事E g (1):S hewas sinaginl go thtec hlirde nt otsa oytuisd. 她e在向子孩们手势，让打们他在留外。 面2( T)h eplocei sginaed tlh ertffic toa movefo rwrd salwlyo.警察 向往车来发信号，示意辆缓前行。 慢(3) e siHgaledn(to ) hte witear ot rinbgt h emeun.

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